Williams, 30, was seriously injured late last month when the motorcycle he was driving crashed on South Marietta Parkway near Atlanta Road. The boxer was thrown from his motorcycle after he swerved to avoid an oncoming car, according to Williams' manager, George Peterson. Police said Williams was speeding and didn't make it around a curve before he crashed.

Doctors and Peterson said Williams is doing well, despite having no movement below the waist.

Williams underwent surgery at WellStar Kennestone Hospital in Marietta before being transferred to the Shepherd Center earlier this month.

Williams is a three-time world champion and was training for an upcoming bout when he crashed.